Abstract
Dietary fiber intake by the Japanese was estimated based on “Standard Tables of Food Composition in Japan —Dietary Fiber—” and the National Nutrition Surveys (1981, 1986-1990).
1) Dietary fiber intake per head per day in 1990 was SDF (water soluble dietary fiber) 2.6g, IDF (water insoluble dietary fiber) 12.2g, and TDF (total dietary fiber) 16.0g respectively. Intake of SDF, IDF and TDF was the highest in 1981 decreasing yearly thereafter until 1990.
2) Sources of IDF and TDF in terms of food groups (1981, 1986-1990) were “other vegetables” ranking the first and “cereals” the second. “Fruits” was the biggest SDF source among the food groups.
3) Daily dietary fiber intake per head by a farmer's family in 1990 was 1.0 time and 1.1 times as much as that by a member of non-farmer's family for SDF, IDF and TDF respectively.
4) When compared in terms of regions, daily SDF intake per head in 1990 was the highest in Kanto area, and IDF and TDF intakes were the highest in Tohoku area. Regional differences in SDF intake were the most outstanding among other differences in the survey.
